The **3C4-R1** typically refers to a specific electronic component model, often associated with **thick film chip resistor arrays** (commonly manufactured by brands like ASJ, Walsin, or Rohm). These components are designed to integrate multiple resistors into a single package to save space on a Printed Circuit Board (PCB). --- ### 1. Key Technical Specifications The "3C4" nomenclature usually indicates the configuration (network type), while "R1" often refers to the specific revision or resistance tolerance. | Feature | Description | | :--- | :--- | | **Component Type** | Thick Film Chip Resistor Array | | **Configuration** | 4-Isolated Resistors (8 Terminals) | | **Package Size** | Typically 1206 (3216 Metric) or 0603x4 | | **Resistance Range** | 10Ω to 1MΩ (Commonly) | | **Tolerance** | ±1% or ±5% | | **Power Rating** | 1/16W or 1/10W per element | --- ### 2. Internal Structure The **3C4-R1** is an "Isolated" type array. Unlike "Bussed" arrays which share a common pin, each resistor in this package has its own dedicated input and output. ```text Terminal Layout (Top View) [8] [7] [6] [5] | | | | [R1] [R2] [R3] [R4] | | | | [1] [2] [3] [4] ``` ### 3. Advantages in Electronics Design Using a resistor array like the 3C4-R1 instead of individual discrete resistors provides several benefits: * **Space Efficiency:** Replaces four 0603 resistors with a single component, reducing the total PCB footprint. * **Manufacturing Speed:** Pick-and-place machines only need one cycle to place four resistors, increasing throughput. * **Reliability:** Fewer solder joints and more uniform thermal characteristics across the four resistors. * **Cost:** Generally cheaper to procure and assemble one array than four individual parts. --- ### 4. Common Applications * **Pull-up/Pull-down Resistors:** Used for digital I/O lines in microcontrollers. * **DRAM/SRAM Termination:** Terminating parallel data buses. * **LED Current Limiting:** Providing consistent current to multiple LED indicators. * **LCD Modules:** Voltage division and signal conditioning.